Degradation of the mountain glaciation of Prins Karls Forland (Svalbard).

2019 ◽  
Vol XXIII (5) ◽  
Keyword(s):  
Mountain Glaciation

scholarly journals Contemporary changes in the area of glaciers in the western part of the Nordenskjold Land (Svalbard)

2018 ◽  
Vol 58 (4) ◽  
pp. 462-472 ◽  
Author(s):  
R. A. Chernov ◽  
A. Ya. Muraviev
Keyword(s):  
High Temperature ◽  
Climate Warming ◽  
Aerial Photography ◽  
Greenland Sea ◽  
The West ◽  
The Past ◽  
Snow Line ◽  
Area Te ◽  
Mountain Glaciation

Climate warming in Svalbard, starting in the 1920s, caused a signifcant reduction in the mountain glaciation of the Nordenskjold Land. Te most extensive changes took place in the Western part of this territory due to the influence of the warm Spitsbergen current creating here the high temperature background. In addition, due to elevation of the level of the climatic snow line, many glaciers have actually lost the area of accumulation. From 1936 to 2017, the area of glaciers in the Western part of this region decreased by 169.5 km2 or 49.5%. Large valley glaciers and numerous small glaciers have lost the greatest area. Te relative losses of the area of glaciers were revealed to be proportional to sizes of them. In average over the past 80 years, glaciers with areas smaller 0.5 km² reduced by 76%, while big glaciers with areas larger 5 km2 – by only 34%. At present, there are 152 glaciers with a total area of 172.73±9.31 km2 in the Western territory of the Land of Nordenskjold (West of the Bolterdalen valley). According to the aerial photography of 2008–2009, the total area of glaciation of the Land of Nordenskjold covers 428 km2. High present-day rates of the retreating of local glaciers are apparently caused by extreme thinning of glacial tongues. At the same time, shrinking of glaciers located in the West of the Peninsula turned out to be more intensive than that of glaciers in its center. Although the Eastern territories receive less precipitation than glaciers near the coast of the Greenland Sea, the Eastern glaciers were found to be more resistant to reduction due to higher locations of them.

scholarly journals Updated cosmogenic chronologies of Pleistocene mountain glaciation in the western United States and associated paleoclimate inferences

2020 ◽  
Vol 242 ◽  
pp. 106427 ◽  
Author(s):  
Benjamin J.C. Laabs ◽  
Joseph M. Licciardi ◽  
Eric M. Leonard ◽  
Jeffrey S. Munroe ◽  
David W. Marchetti
Keyword(s):  
United States ◽  
Western United States ◽  
Mountain Glaciation

scholarly journals Timing and nature of late Quaternary mountain glaciation

2008 ◽  
Vol 23 (6-7) ◽  
pp. 503-508 ◽  
Author(s):  
Glenn D. Thackray ◽  
Lewis A. Owen ◽  
Chaolu Yi
Keyword(s):  
Late Quaternary ◽  
Mountain Glaciation

Downscaling CESM2 in CLM5 to Hindcast Pre-Industrial Equilibrium Line Altitude for Tropical Mountains

2021 ◽  
Author(s):  
Nicholas Heavens
Keyword(s):  
Climate Model ◽  
Climate Modeling ◽  
Global Climate ◽  
Equilibrium Line ◽  
Lapse Rate ◽  
Surface Mass Balance ◽  
Low Resolution ◽  
Equilibrium Line Altitude ◽  
Surface Mass ◽  
Mountain Glaciation

<p>Highland environments are rarely preserved in the geological record, particularly from as early as the Paleozoic Era. However, several stratigraphic locations are now known which definitely or potentially preserve such environments near the paleoequator during the Late Carboniferous and Early Permian Periods, during which the Earth was in the depths of an icehouse climate like that of the Pliocene and Pleistocene Epochs, the Late Paleozoic Ice Age (LPIA). Several of these locations contain evidence of mountain glaciation at altitudes below 2000 m, leading to questions about the significance of tropical mountain glaciation for global climate during this interval of geologic time. However, climate model simulations for the LPIA have not been able to simulate mountain glaciation like that inferred from the geological record, possibly because of low resolution, incorrect boundary conditions, or climate model bias resulting from incomplete representation of moist convective processes impacting tropical lapse rates. </p><p>The overarching purpose of this study is to develop a climate modeling framework that enables the significance of mountain glaciation for global paleoclimate to be evaluated. Ideally, such a framework would allow low-resolution global model output to be downscaled to the scale of a mountain range to calculate the equilibrium line altitude and similar parameters, enabling evidence of mountain glaciation in the deep past to be used to constrain/tune the low-resolution global models. While this study was designed to inform a specific problem in deep time paleoclimate, its results are likely broadly applicable to assessing how well mountain glaciation is captured by global climate modeling of the past, present, and future.   </p><p>Here, I present a framework in which the CMIP6 pre-industrial control simulation for the Community Earth System Model version 2 (CESM2) at 0.9°x1.25° resolution is used to generate a data atmosphere for the Community Land Model version 5 (CLM5) run at 0.01° resolution in 10 tropical and 1 mid-latitude domain to study the surface mass balance over the domain. For computational reasons, glaciation is assumed to cover a small portion of each grid cell, but surface mass balance still can be evaluated. Topographic boundary conditions come from GMTED2010, but most other information is directly interpolated from the CESM2 simulation. CLM5 simulations require a fixed lapse rate to be assumed, which is varied in each CLM5 simulation across six different values. The CLM5 simulation output along with the mean tropical lapse rate in the CESM2 simulation is then used to evaluate the various biases of this framework in comparison with estimated pre-industrial equilibrium line altitudes for the studied domains.</p><p>This work is supported by the National Science Foundation (USA) under grant EAR-1849754. </p>

scholarly journals The MIS 3 maximum of the Torres del Paine and Última Esperanza ice lobes in Patagonia and the pacing of southern mountain glaciation

2018 ◽  
Vol 185 ◽  
pp. 9-26 ◽  
Author(s):  
Juan-Luis García ◽  
Andrew S. Hein ◽  
Steven A. Binnie ◽  
Gabriel A. Gómez ◽  
Mauricio A. González ◽  
...  
Keyword(s):  
Mis 3 ◽  
Torres Del Paine ◽  
Mountain Glaciation
Sign in / Sign up

Export Citation Format

Share Document